Soundcloud is absolutely ubiquitous in the electronic music community. I was talking about this with a friend recently who is a programmer and a (relatively) well known composer, and she made the point that soundcloud actually represents a very important cultural document; there is tons of music that has been created in the past 5+ years that exists exclusively there, and it would be a tremendous cultural loss if it…
When Grooveshark died, that set of original music spun by the DJs was essentially lost- which sucked because that was my go-to for "work music". I've only started to find the tracks again, some on soundcloud, YouTube, etc.
Worst part is, the guys responsible for the music station, which was definitely growing, hasn't done much to start again. It's understandable, when you think of how difficult it is to grow a brand from nothing.